WO2020093546A1 - Procédé et système de réglage de luminosité pour système d'affichage, et système d'affichage - Google Patents

Procédé et système de réglage de luminosité pour système d'affichage, et système d'affichage Download PDF

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Publication number
WO2020093546A1
WO2020093546A1 PCT/CN2018/122328 CN2018122328W WO2020093546A1 WO 2020093546 A1 WO2020093546 A1 WO 2020093546A1 CN 2018122328 W CN2018122328 W CN 2018122328W WO 2020093546 A1 WO2020093546 A1 WO 2020093546A1
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WO
WIPO (PCT)
Prior art keywords
light
brightness
block
backlight
display panel
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Application number
PCT/CN2018/122328
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English (en)
Chinese (zh)
Inventor
康志聪
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惠科股份有限公司
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Publication of WO2020093546A1 publication Critical patent/WO2020093546A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

Definitions

  • the present application relates to the technical field of liquid crystal display, in particular to a brightness adjustment method of a display system, a brightness adjustment system and a display system.
  • the brightness of the LCD panel display is controlled by the backlight module, the signal driving circuit and the glasses driving circuit.
  • the backlight module is composed of a plurality of light-emitting elements arranged in a certain manner.
  • the light-emitting elements are used to light up the blocks of the liquid crystal panel. Due to the difference in the manufacturing process of the light-emitting elements, the average brightness of the backlight of each block of the liquid crystal panel is different from each other.
  • both the panel and the liquid crystal glasses need to be driven for a certain time to output a stable penetration rate; if the opening of the liquid crystal glasses is synchronized with the writing of the driving signal of the liquid crystal panel and the opening of the backlight module, the wearing of the liquid crystal glasses
  • the combined effect of the transmissivity response, the transmissivity response of the liquid crystal panel and the average brightness of the backlight of each block of the liquid crystal panel makes the transmissivity response of the liquid crystal glasses corresponding to each block of the liquid crystal panel, the transmissivity response of the liquid crystal panel and the liquid crystal panel
  • the products of the average brightness of the backlight of each block are not equal, which results in the uneven brightness of the liquid crystal glasses of each block of the liquid crystal panel.
  • Various embodiments according to the present application provide a brightness adjustment method, brightness adjustment system, and display system of a display system.
  • a brightness adjustment method for a display system is set to adjust the brightness of a display panel through glasses, the display panel is lit by a backlight module, the glasses include a first lens and a second lens, and the display panel includes a plurality of areas Block, the backlight module includes a plurality of light emitting elements; the brightness adjustment method of the display system includes the following steps:
  • a brightness adjustment system is set to adjust the brightness of a display panel through glasses.
  • the display panel is lit by a backlight module.
  • the glasses include a first lens and a second lens.
  • the display panel includes a plurality of blocks.
  • the backlight module includes a plurality of light emitting elements;
  • the brightness adjustment system includes a signal driving circuit, a glasses driving circuit and a control circuit;
  • the signal driving circuit is configured to write the first driving signal to the display panel; the glasses driving circuit is configured to control the first lens to turn on; the control circuit is configured to control the backlight module to turn on; the control circuit is also configured to pass through The glasses driving circuit controls the first lens and the backlight module to be turned on simultaneously;
  • the multiple light-emitting elements of the backlight module are turned on in sequence, and the first lens and the first light-emitting element of the backlight module are turned on simultaneously;
  • the control circuit is also set to adjust the first turn-on time of each light-emitting element
  • the signal driving circuit is further configured to write a second driving signal to the display panel;
  • the glasses driving circuit is configured to control the second lens to turn on;
  • the control circuit is also configured to control the second lens and the backlight through the glasses driving circuit
  • the modules are turned on at the same time;
  • the multiple light-emitting elements of the backlight module are turned on in sequence, and the second lens and the first light-emitting element of the backlight module are turned on simultaneously;
  • the control circuit is also configured to adjust the second turn-on time of each light-emitting element.
  • a display system includes a display panel and the above-mentioned brightness adjustment system.
  • FIG. 1 is a flowchart of a method for adjusting the brightness of a display system in an embodiment
  • FIG. 2 is a corresponding diagram of a unilateral side-entry light source and a block in an embodiment
  • FIG. 3 is a corresponding diagram of a bilateral side-entry light source and a block in an embodiment
  • FIG. 4 is a corresponding diagram of a direct light source and a block in an embodiment
  • FIG. 5 is a timing diagram of display panel transmittance, glasses transmittance, and backlight brightness in one display cycle in one embodiment
  • 6 is a timing diagram of display panel penetration rate, eyeglass penetration rate, and backlight brightness in one display cycle in another embodiment
  • FIG. 7 is a timing diagram of display panel transmittance, glasses transmittance, and backlight brightness in a display cycle in another embodiment
  • 8 is a timing diagram of display panel penetration rate, eyeglass penetration rate, and backlight brightness in one display cycle in another embodiment
  • 9 is a timing diagram of display panel penetration rate, glasses penetration rate, and backlight brightness in one display cycle in another embodiment
  • 10 is a timing diagram of display panel penetration rate, eyeglass penetration rate, and backlight brightness in one display cycle in another embodiment
  • 11 is a timing diagram of display panel penetration rate, eyeglass penetration rate, and backlight brightness in one display cycle in another embodiment
  • FIG. 12 is a timing diagram of display panel penetration rate, glasses penetration rate, and backlight brightness in one display cycle in another embodiment
  • FIG. 13 is a flowchart of a method for adjusting the brightness of a display system in another embodiment
  • FIG. 14 is a functional block diagram of a brightness adjustment system in an embodiment.
  • FIG. 1 is a flowchart of a brightness adjustment method of a display system provided by a preferred embodiment of the present application. It should be noted that the method of the present application is not limited to the order of the following steps, and in other embodiments, the method of the present application may include only some of the following steps, or some of the steps may be deleted. In addition, in other embodiments, one step may be split into multiple steps, or multiple steps may also be combined into one step.
  • the brightness adjustment method of the display system is used to adjust the brightness of a display panel through glasses, the display panel is lit by a backlight module, the glasses include a first lens and a second lens, and the display panel includes a plurality of blocks
  • the backlight module includes a plurality of light emitting elements, and the plurality of light emitting elements constitute a backlight source.
  • the brightness adjustment method of the display system includes the following steps:
  • step S1 the first driving signal is written into the display panel.
  • the glasses are 3D liquid crystal glasses
  • the display panel is a 3D liquid crystal display panel.
  • the backlight source may be an edge-type light source or a direct-type light source.
  • the side-entry light source includes a single-sided side-entry light source and a double-sided side-entry light source. Each light-emitting element of the backlight module is turned on in sequence.
  • the driving signal includes a first driving signal and a second driving signal.
  • the side-entry light source is a unilateral side-entry light source
  • the light-emitting elements are LEDs (Light Emitting Diodes), and the number is N
  • the side-entry light source is a double-sided side-entry light source
  • the light-emitting elements are LEDs and the number is 2N
  • each two LEDs correspond to a block
  • each two LED lighting corresponds to a block, for example, LED1A and LED1B lighting block BL1, LED2A and LED2B lighting block BL2, ..., LEDNA and LEDNB lighting block BLN.
  • the side-lit light source uses a small number of light-emitting elements, which is conducive to product weight reduction.
  • the backlight is a direct light source.
  • the number of the plurality of light-emitting elements is N * M, arranged in a matrix of N rows and M columns, M LEDs in each row correspond to one block, and M LEDs in each row light up corresponding to one block,
  • the light emitting element is an LED.
  • LED1A, LED1B, ..., LED1M constitute the first row of LED backlight unit LED1;
  • Each row of LED backlight units is used to light up a corresponding block, for example, LED1 lights up block BL1, LED2 lights up block BL2, ..., LEDN lights up block BLN.
  • the direct light source can make the brightness of each block of the display panel more uniform.
  • the light-emitting element may also be a CCFL (Cold Cathode Fluorescent Lamp).
  • CCFL Cold Cathode Fluorescent Lamp
  • step S2 the first lens and the backlight module are controlled to be turned on at the same time, wherein the plurality of light emitting elements of the backlight module are turned on in sequence, and the first lens and the first turned on light emitting element of the backlight module are turned on at the same time.
  • the brightness of each block of the display panel through the liquid crystal glasses is the product of the transmittance of the display panel, the transmittance of the glasses, and the average brightness of the backlight of the display panel.
  • the average backlight brightness of the display panel is the average brightness of the backlight that lights up the display panel
  • the brightness of the display panel is the brightness of the display panel display. Due to the physical characteristics of the liquid crystal response of the display panel and glasses, both the display panel and the glasses need to be driven for a certain time to output a stable penetration rate and the display panel reaches a stable penetration rate output time and the glasses reach a stable penetration rate output The time is inconsistent.
  • the driving signal is written to the display panel and the glasses are turned on in synchronization with the backlight module, the penetration rate of each block of the display panel, the penetration rate of the glasses corresponding to each block and each block of the display panel There is a difference in the product of the average brightness of the backlight.
  • the sequence of the display panel, the opening of the glasses, and the opening of the backlight module can be adjusted by the driving signal, so that the penetration rate of each block of the display panel tends to be equal, thereby allowing the penetration of each block of the display panel
  • the product of the rate, the penetration rate of the glasses corresponding to each block, and the average brightness of the backlight of each block of the display panel tends to be equal, so that the brightness of each block of the display panel through the liquid crystal glasses tends to be uniform.
  • the average brightness of the backlight of each block corresponds to the average brightness of the light-emitting elements of each block.
  • the display panel has sufficient time to respond to a stable and tending For an equal penetration rate, at this time, the product of the penetration rate of each block of the display panel, the penetration rate of the glasses corresponding to each block and the average brightness of the backlight of each block of the display panel tends to be equal .
  • step S3 the first turn-on time of each light-emitting element is adjusted.
  • the first turn-on time is the turn-on time of each light-emitting element in a display period of the display panel, corresponding to the writing of the first driving signal and the turning on of the first lens.
  • This application also adjusts the turn-on time of each light-emitting element, thereby adjusting the average brightness of the backlight of each block of the display panel, so that the penetration rate of each block of the display panel, the penetration of the glasses corresponding to each block The rate is equal to the product of the average brightness of the backlight of each block of the display panel, so that the brightness of each block of the display panel through the liquid crystal glasses tends to be uniform.
  • the first driving signal is written into the display panel, and the turn-on time of each light-emitting element reaches the corresponding first turn-on time and then turns off.
  • step S4 the turn-on sequence of the corresponding light-emitting elements is controlled according to the average brightness of the backlight of each block.
  • the penetration rate of the glasses is relatively small. With the increase of the opening time, the penetration rate of the glasses gradually increases and tends to be stable.
  • each light-emitting element of the backlight module is controlled to be turned on in order of the average backlight brightness of the corresponding block from high to low.
  • the application also starts by turning on the light-emitting element corresponding to the block with the highest average brightness of the backlight when the penetration rate of the glasses is small, and according to the backlight of the corresponding block during the process of the penetration rate of the glasses gradually increasing to a stable
  • the average brightness is turned on in order from high to low, so that the transmittance of each block of the display panel and the transmittance of the glasses corresponding to each block are equal to the product of the average brightness of the backlight of each block of the display panel.
  • Step S5 Write the second driving signal to the display panel.
  • step S6 the second lens and the backlight module are controlled to be turned on at the same time, wherein the plurality of light emitting elements of the backlight module are turned on in sequence, and the second lens and the first turned on light emitting element of the backlight module are turned on simultaneously.
  • step S7 the second turn-on time of each light-emitting element is adjusted.
  • the second turn-on time is the turn-on time of each light-emitting element in a display period of the display panel, corresponding to the writing of the second driving signal and the turning on of the second lens.
  • the second driving signal is written into the display panel, and the turn-on time of each light-emitting element reaches the corresponding second turn-on time and then turns off.
  • step S8 the turn-on sequence of the corresponding light-emitting elements is controlled according to the average brightness of the backlight of each block.
  • Curve 1 is the first driving signal written into the display panel.
  • Curve 2 is the first glasses penetration rate of the first lens corresponding to each light emitting element, and the first glasses penetration rate of the first lens corresponding to each light emitting element is L_T_1, L_T_2, ..., L_T_N.
  • the " ⁇ " of the display cycle in the first half of FIG. 5 is the first panel penetration rate corresponding to the turn-on time of each light-emitting element in each block, and the first panel penetration corresponding to the turn-on time of each light-emitting element in each block
  • the rates are OC_TL_1, OC_TL_2, ..., OC_TL_N.
  • the rectangle in the first half of the display period in FIG. 5 represents the average backlight brightness of each block.
  • the average brightness of block BL1 is BL_ave_1
  • the average brightness of block BL2 is BL_ave_2, ...
  • the average brightness of block BLN is BL_ave_N. Due to differences in the manufacturing process of the backlight module, BL_ave_1 ⁇ BL_ave_2 ⁇ ... ⁇ BL_ave_N.
  • Curve 3 is the second driving signal written into the display panel.
  • Curve 4 is the second lens penetration rate of the second lens corresponding to each light-emitting element, and the second lens penetration rate of the second lens corresponding to each light-emitting element is R_T_1, R_T_2, ..., R_T_N.
  • the " ⁇ " of the display period in the second half of FIG. 5 is the second panel penetration rate corresponding to the turn-on time of each light-emitting element in each block, and the second panel penetration corresponding to the turn-on time of each light-emitting element in each block Transmittances are OC_TR_1, OC_TR_2, ..., OC_TR_N.
  • the average brightness of block BL1 is BL_ave_1
  • the average brightness of block BL2 is BL_ave_2, ...
  • the average brightness of block BLN is BL_ave_N. Due to differences in the manufacturing process of the backlight module, BL_ave_1 ⁇ BL_ave_2... ⁇ BL_ave_N.
  • the display panel has enough time to respond to reach a stable and tending to equal transmittance, and adjust each The turn-on time of each light-emitting element, and then adjust the average brightness of each block of the display panel, the turn-on time of each light-emitting element is adjusted from t1, t2, ..., tN to the first turn-on time tL1, tL2, .. ., TLN and the second turn-on time tR1, tR2, ..., tRN.
  • the average brightness of block BL1 changes from BL_ave_1 to BL_ave_L1 '
  • the average brightness of block BL2 changes from BL_ave_2 to BL_ave_L2'
  • ... the average brightness of block BLN changes from BL_ave_N Becomes BL_ave_LN '.
  • the first panel transmittance corresponding to the turn-on time of each light-emitting element in each block changes from OC_TL_1, OC_TL_2, ..., OC_TL_N to OC_TL_1 ', OC_TL_2', ..., OC_TL_N ', OC_TL_1' ⁇ OC_TL_2' ... ⁇ OC_TL_N '.
  • the first glasses corresponding to each light-emitting element have a first glasses transmittance of L_T_1, L_T_2, ..., L_T_N.
  • the average brightness of block BL1 changes from BL_ave_1 to BL_ave_R1 '
  • the average brightness of block BL2 changes from BL_ave_2 to BL_ave_R2'
  • the average brightness of block BLN changes from BL_ave_N becomes BL_ave_R'N '
  • the second eyeglasses corresponding to each light emitting element have a second eyeglass penetration rate of R_T_1, R_T_2, ..., R_T_N.
  • the second panel transmittance corresponding to the turn-on time of each light-emitting element in each block changes from OC_TR_1, OC_TR_2, ..., OC_TR_N to OC_TR_1 ', OC_TR_2', ..., OC_TR_N ', OC_TR_1' ⁇ OC_TR_2' ... ⁇ OC_TR_N '.
  • the brightness of each section of the panel through the second lens is uniform.
  • the application also turns on the light-emitting element corresponding to the block with the highest average brightness when the penetration rate of the glasses is small, and gradually increases the penetration rate of the glasses to a stable process. Turn on the rest of the light-emitting elements in the order of the average backlight brightness of the corresponding block from high to low.
  • step S1 there are steps:
  • step S01 the first driving signal is written into the display panel, and each light-emitting element of the backlight module is controlled to turn on in turn.
  • Step S02 detecting the average brightness of the backlight of each block.
  • Step S03 Sort the average backlight brightness of each block.
  • the brightness adjustment method of the display system of the present application on the premise that the plurality of light-emitting elements of the backlight module are turned on in sequence, first writes the driving signal to the display panel, and then controls the first lens and the backlight module at the same time Turn on, the display panel response reaches a stable and tends to be equal to the penetration rate, the penetration rate of each block of the display panel, the penetration rate of the glasses corresponding to each block and the backlight of each block of the display panel are average
  • the product of brightness tends to be equal; by adjusting the turn-on time of each light-emitting element, the average brightness of each block of the display panel is adjusted, so that the transmittance of each block of the display panel, the corresponding
  • the penetration rate of the glasses is equal to the product of the average brightness of the backlight of each block of the display panel, so that the brightness of each block of the display panel through the liquid crystal glasses tends to be uniform.
  • the average brightness of the backlight turns on the rest of the light-emitting elements in order from high to low, so that the penetration rate of each block of the display panel, the penetration rate of the glasses corresponding to each block, and the average brightness of the backlight of each block of the display panel are equal .
  • the brightness adjustment method of the display system provided by the embodiment of the present application will be described in detail below in conjunction with FIG. 14. It should be noted that the brightness adjustment system shown in FIG. 14 is used to perform the method of the embodiment shown in FIG. 1 of the present application. For convenience of description, only the parts related to the embodiment of the present application are shown, and specific technical details are not disclosed. Please refer to the embodiment shown in FIG. 1 of this application.
  • the brightness adjustment system is used to adjust the brightness of the display panel through the glasses.
  • the display panel is lit by a backlight module.
  • the glasses include a first lens and a second lens.
  • the display panel includes a plurality of Block, the backlight module includes a plurality of light-emitting elements, and the plurality of light-emitting elements constitute a backlight source.
  • the brightness adjustment system includes a signal driving circuit 10, a glasses driving circuit 20, and a control circuit 30.
  • the signal driving circuit 10 is used to write the first driving signal to the display panel.
  • the glasses driving circuit 20 is used to control the first lens to turn on; the control circuit 30 is used to control the backlight module to turn on.
  • the control circuit 30 is also used to control the first lens and the backlight module to be turned on at the same time through the glasses driving circuit 20. Wherein, the multiple light-emitting elements of the backlight module are turned on in sequence, and the first lens and the first light-emitting element of the backlight module are turned on simultaneously.
  • the control circuit 30 is also used to adjust the first turn-on time of each light-emitting element.
  • the signal driving circuit 10 is also used to write the second driving signal to the display panel.
  • the glasses driving circuit 20 is used to control the opening of the second lens.
  • the control circuit 30 is also used to control the second lens and the backlight module to be turned on at the same time through the glasses driving circuit 20.
  • the plurality of light-emitting elements of the backlight module are turned on in sequence, and the second lens and the first light-emitting element of the backlight module are turned on at the same time.
  • the control circuit 30 is also used to adjust the second turn-on time of each light-emitting element.
  • the control circuit 30 is also used to control the turn-on sequence of the corresponding light-emitting elements according to the average brightness of the backlight of each block.
  • the brightness adjustment system also includes a brightness detector 40.
  • the brightness detector 40 is used to detect the average backlight of each block when the signal driving circuit 10 writes the first driving signal to the display panel, and the control circuit 30 controls each light-emitting element of the backlight module to turn on sequentially The brightness is transmitted to the control circuit 30.
  • the control circuit 30 is also used to sort the average backlight brightness of each block. Further, the control circuit 30 is also used to control each light-emitting element of the backlight module to turn on in order of the average backlight brightness of the corresponding block from high to low.
  • the present application also provides a display system, which includes a display panel and the above-mentioned brightness adjustment system.
  • the display panel in the embodiment of the present application may be any one of the following: liquid crystal display panel, OLED display panel, QLED display panel, twisted nematic (TN) or super twisted nematic (Super Twisted Nematic, STN) type, flat Switching (In-Plane, Switching, IPS) type, Vertical Alignment (VA) type, curved type panel, or other display panel.
  • TN twisted nematic
  • STN super twisted nematic
  • IPS flat Switching
  • VA Vertical Alignment
  • curved type panel or other display panel.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un procédé de réglage de luminosité pour un système d'affichage, comprenant les étapes consistant à : écrire un premier signal d'entraînement dans un panneau d'affichage (S1) ; commander une première lentille et un module de rétroéclairage pour qu'ils démarrent simultanément, de multiples éléments électroluminescents du module de rétroéclairage pour qu'ils démarrent séquentiellement, et la première lentille et un élément électroluminescent du module de rétroéclairage qui est démarré en premier pour qu'ils démarrent simultanément (S2) ; régler un premier temps de démarrage de chaque élément électroluminescent (S3) ; écrire un second signal d'entraînement dans le panneau d'affichage (S5) ; commander une seconde lentille et le module de rétroéclairage pour qu'ils démarrent simultanément, de multiples éléments électroluminescents du module de rétroéclairage pour qu'ils démarrent séquentiellement, et la seconde lentille et l'élément électroluminescent du module de rétroéclairage qui est démarré en premier pour qu'ils démarrent simultanément (S6) ; et régler un second temps de démarrage de chaque élément électroluminescent (S7).
PCT/CN2018/122328 2018-11-07 2018-12-20 Procédé et système de réglage de luminosité pour système d'affichage, et système d'affichage WO2020093546A1 (fr)

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CN201811320744.6 2018-11-07
CN201811320744.6A CN109166535B (zh) 2018-11-07 2018-11-07 显示系统的亮度调节方法、亮度调节系统及显示系统

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